A bungalow loft conversion turns the roof space into one or more rooms, reached by a new staircase from the ground floor. Because bungalows often have large roof spaces, conversions can create a lot of new living space, but the larger footprint means costs are usually higher than for a house. Many can be done under permitted development.
Last reviewed 22 September 2026. Based on our research into official and published sources, listed at the end of this page.
What is a bungalow loft conversion?
Bungalows usually have a wide roof, so the loft can be large. A conversion may use rooflights, dormers or a hip-to-gable change, depending on the roof shape and height, to create bedrooms or a bedroom with a bathroom.
A new staircase has to fit into the ground floor, which is one of the main things to plan early.
Which houses suit it
Bungalows with enough head height in the loft. Shallow roofs may need the roof raising, which needs planning permission.
How much does a bungalow loft conversion cost?
In Berkshire, expect roughly £72,000 to £114,000 to build a typical 50m² bungalow conversion, before VAT and fees. Elsewhere in the UK the typical range is £63,000 to £88,000. These are research-based estimates, not quotes.
Bungalow: typical build costs in Berkshire
Conversion type
Floor area
Typical build cost
Build time
Bungalow
50m²
£72,000 to £114,000
10 to 12 weeks
Ranges, not quotes. Build cost only: excludes VAT, professional fees, planning and building control. Last updated September 2026.
Add VAT, drawings, a structural engineer, building control and any party wall costs to get a total. Use the calculator for your own size and finish, or read the cost guide.
Planning and building regulations
The same permitted development rules apply as for houses: up to 50m³ of extra roof space for a detached or semi-detached bungalow, nothing higher than the existing roof, and similar materials. Raising the roof, a front dormer facing a road, or work in a conservation area needs planning permission.
Whatever the planning position, every loft conversion needs building regulations approval, covering structure, fire safety, stairs and insulation. See our planning guide and building regulations guide.
Pros and cons
Pros
Can add a large amount of living space
Keeps everything on one plot without an extension
Often permitted development
Cons
Usually costs more than a house conversion, because of the larger area
The staircase takes space from the ground floor
Shallow roofs may need raising, which needs permission
How long it takes
Checkatrade's typical build time for a bungalow conversion is 10 to 12 weeks on site, after design, approvals and any party wall process. See the process and timeline guide.
This may be allowed under permitted development or may need planning permission, depending on the size and your property.
Where it's common in Berkshire
Based on the local mix of homes, this type is most likely to suit houses in Ascot, Twyford and Wokingham:
From 2021 Census and VOA figures for each town. A tendency, not a guarantee for any one house.
Frequently asked questions
How much does a bungalow loft conversion cost?
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In Berkshire, a typical 50m² bungalow conversion costs roughly £72,000 to £114,000 to build, before VAT and fees, against £63,000 to £88,000 elsewhere in the UK. These estimates come from published cost guides; your quotes will depend on your roof and the specialist.
Can every bungalow have a loft conversion?
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Not every one. The loft needs enough head height, and there needs to be space for a staircase. A specialist survey will check the roof structure and height.
Do bungalow loft conversions need planning permission?
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Often not, if the work stays within permitted development: up to 50m³ of extra roof space for a detached or semi-detached bungalow and nothing higher than the existing roof. Raising the roof or building in a conservation area needs permission.
This guide is general information to help you plan. It is not legal or professional advice: check your own project with your council or a qualified professional.
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